Stair stringer



FIG. 1 is a top first perspective view of a first embodiment of a stair stringer showing my design configured for use as a right stringer;

FIG. 2 is a top second perspective view thereof;

FIG. 3 is a bottom first perspective view thereof;

FIG. 4 is a bottom second perspective view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a front view thereof;

FIG. 10 is a back view thereof;

FIG. 11 is a top first perspective of a second embodiment of a stair stringer showing my design configured for use as a left stringer;

FIG. 12 is a top second perspective view thereof;

FIG. 13 is a bottom first perspective view thereof;

FIG. 14 is a bottom second perspective view thereof;

FIG. 15 is a right side view thereof;

FIG. 16 is a left side view thereof;

FIG. 17 is a top view thereof;

FIG. 18 is a bottom view thereof;

FIG. 19 is a front view thereof;

FIG. 20 is a back view thereof;

FIG. 21 is a top first perspective of a third embodiment of a stair stringer showing my design configured for use as a right stringer;

FIG. 22 is a top second perspective view thereof;

FIG. 23 is a bottom first perspective view thereof;

FIG. 24 is a bottom second perspective view thereof;

FIG. 25 is a right side view thereof;

FIG. 26 is a left side view thereof;

FIG. 27 is a top view thereof;

FIG. 28 is a bottom view thereof;

FIG. 29 is a front view thereof;

FIG. 30 is a back view thereof;

FIG. 31 is a top first perspective of a fourth embodiment of a stair stringer showing my design configured for use as a left stringer;

FIG. 32 is a top second perspective view thereof;

FIG. 33 is a bottom first perspective view thereof;

FIG. 34 is a bottom second perspective view thereof;

FIG. 35 is a right side view thereof;

FIG. 36 is a left side view thereof;

FIG. 37 is a top view thereof;

FIG. 38 is a bottom view thereof;

FIG. 39 is a front view thereof; and,

FIG. 40 is a back view thereof.

The dashed broken lines depict portions of the stair stringer which form no part of the claimed design. 

CLAIM The ornamental design for a stair stringer, as shown and described. 